package net.sf.repairslab.util.ui.txf;

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;

public class JTextFieldLimit extends PlainDocument {
	private int	    limit;
	// optional uppercase conversion
	private boolean	toUppercase	= false;
	
	public JTextFieldLimit(int limit) {
		super();
		this.limit = limit;
	}
	
	public JTextFieldLimit(int limit, boolean upper) {
		super();
		this.limit = limit;
		toUppercase = upper;
	}
	
	public void insertString(int offset, String str, AttributeSet attr) throws BadLocationException {
		if (str == null)
			return;
		
		if ((getLength() + str.length()) <= limit) {
			if (toUppercase)
				str = str.toUpperCase();
			super.insertString(offset, str, attr);
		}
	}
	
}
